Cost to build a flat roof extension in TW9

Flat roof extension cost in TW9

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in TW9?

A flat roof extension ranges from the cheapest of £21,824 (Embury Building Services Ltd based in TW10) to the dearest of £21,944 (Demre Home Refurbishment based in TW9), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.

Find out how much your flat roof extension will cost in TW9 by posting a job with HaMuch. We'll send it to extension builders in TW9.

Estimates for flat roof extension near TW9

How much does a flat roof extension cost?
Flat roof extension cost per m2
Factors affecting the cost of flat roof extensions
Advantages and disadvantages of flat roofs
Which is cheaper: a flat roof or pitched roof?
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Do you need planning permission for a flat roof extension?
How long does a flat roof last?
Can you walk on a flat roof extension?
What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,380
	Build a two storey extension	£87,820
	Build a timber frame extension	£25,880
	Install a swimming pool	£80,880
	Cost to build a single storey extension	£52,600
	Cost to build a side return extension	£40,150
	Install an RSJ	£2,080
	Build an outbuilding	£9,880
	Build a mansard loft conversion	£51,880
	Cost of a loft conversion	£32,625
	Build a kitchen extension	£41,880
	Build a hip to gable loft conversion	£41,880
	Build a granny annexe	£86,880
	Build a garden office	£9,880
	Convert a garage	£15,880
	Build a new garage	£18,380
	Build a flat roof extension	£21,880
	Build a dormer loft conversion	£41,880
	Lay a concrete foundation	£6,130
	Convert a bungalow loft	£28,880
	Basement conversion cost	£36,150

Business name	Flat roof extension cost
Demre Home Refurbishment, Surrey, TW9	£21,944
11th Hour Construction Group, 108-110 Sheen Road, Richmond, London, TW9	£21,840
West 1 Construction, 2 Sheen Road, Richmond, Greater London, TW9	£21,840
The Bespoke Building Company, Surrey, TW9	£21,944
Edmond & Tann Builders, Richmond, TW10	£21,856
London Urban - Intelligent Construction, Richmond-upon-Thames, London, Surrey, TW9	£21,840
FL Construction London, 179 Lower Richmond Road, Richmond, Surrey, TW9	£21,840
Embury Building Services Ltd, Richmond, TW10	£21,824
Renovations, Building, Servicing and Maintenance, 3C Blake Mews, Kew, Richmond, Greater London, TW9	£21,840
Pro Construction London Ltd, Greater London, TW9	£21,944
Andy Harris Construction, Lichfield Road, Kew, TW9	£21,888
Sherif Mourad, Surrey, TW10	£21,944
Kapeti Ltd, Surrey, TW9	£21,944
Family developments Ltd, London, Greater London, sw14	£21,840
Evolution Design and Construction, Greater London, TW10	£21,944
Build Space London Ltd, London, Greater London, SW14	£21,840
R10 Builders Ltd, Richmond upon Thames, Surrey, tw9	£21,840
Gem Look Construction Ltd., Richmond Surrey, SW14	£21,936
JOHN HOPWOOD DELTA CONSTRUCTION SERVICES, Chiswick, W4	£21,848
Metos Design & Build, Surrey, SW14	£21,944
Sunny Eco, 345 Upper Richmond Road, London, Surrey, SW14	£21,840
Raylian Power Design, 206 Mortlake Business Centre, 20 Mortlake High Street, Mortlake, Greater London, SW14	£21,840
Raylian Power Design, Greater London, SW14	£21,944
MCB Developments, London, Greater London, SW14	£21,840
BUILDING ANGELS LTD, Brentford, TW8	£21,856

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Flat roof extension cost in TW9

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Flat roof extension cost in TW9

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